Question

In the early twentieth century, Alfred Wegener proposed the continental drift hypothesis. He thought the continents had once been joined together and had drifted apart. Look at the images of Africa and South America. They look like they fit together like a puzzle piece. What other patterns do you notice in the shape of the continents to suggest that they once all fit together

Answer 1

He claimed that they were one large supercontinent called Pangaea.  His evidence for his claim was that the general shapes of the separate continents and how they can fit together if you arrange them. He noticed patterns in the mountain ranges; when all the continents are together the ranges line up with one another.